R-G-W slivers that can get scary quite fast when they are being kept in check by control decks, because they link on the battelfield beautifully and hit harder and harder as the game goes on (they can fly too). This deck is central to the idea of getting out manaweft so that each sliver can be a mana of any color.

A few things to remember are that you do not have to be afraid about r taking some early damage - but if you are worried about your opponents deck, using the charms in order to stabilize wont hurt you either, because later you will be swinging with huge slivers that wont die easily and by late game you can use any remaining burn spells or enchantments to complement and support your heavy hitting slivers get through for the win by eliminating blockers
Take out:
(2) Forest or perhaps only 1 forest
(1) quick sliver
(1) pacifism
(2) Giant growth
2) lightning bolts
1) Elixir of Immortality
(1) titanic growth
(1) Aerial Predation